Theory

CH1 - STATES OF MATTER

The diagram shows how the molecules in the exhaust gases diffuse into the air.Which statement describes what happens to these molecules next?A. The mo...

2009 Summer

Theory

CH1 - STATES OF MATTER

Molten lead(II) bromide is electrolysed as shown. Which ions are discharged at each electrode?[Table_1]Positive electrode | Negative electrodeA: Pb+ |...

2009 Summer

Theory

CH1 - STATES OF MATTER

Which of these elements could be formed at the anode when a molten salt is electrolysed?A. copperB. iodineC. lithiumD. strontium

2009 Summer

Theory

CH1 - STATES OF MATTER

The diagram shows how the molecules in the exhaust gases diffuse into the air. Which statement describes what happens to these molecules next? A. T...

2009 Summer

Theory

CH1 - STATES OF MATTER

Which of these elements could be formed at the anode when a molten salt is electrolysed?A copperB iodineC lithiumD strontium

2009 Summer

Theory

CH1 - STATES OF MATTER

Molten lead(II) bromide is electrolysed as shown. [Image_1: Diagram of an electrolytic cell with molten lead(II) bromide] Which ions are discharged a...

2009 Summer

Theory

CH1 - STATES OF MATTER

The results of experiments on electrolysis using inert electrodes are given in the table.Complete the table; the first line has been completed as an e...

2009 Summer

Theory

CH1 - STATES OF MATTER

Some grass is crushed and mixed with the solvent, propanone. The colour pigments are extracted to give a deep green solution.(a) (i) Draw a labelled d...

2009 Summer

Theory

CH1 - STATES OF MATTER

The results of experiments on electrolysis using inert electrodes are given in the table. Complete the table; the first line has been completed as an ...

2009 Summer

Theory

CH1 - STATES OF MATTER

The following is a list of the electron distributions of atoms of unknown elements.[Table_1: element - electron distribution](a) Choose an element fro...

2009 Summer

MCQ

CH1 - STATES OF MATTER

Small crystals of purple $\text{KMnO}_4$ $(M_r = 158)$ and orange $\text{K}_2\text{Cr}_2\text{O}_7$ $(M_r = 294)$ were placed at the centres of separa...

2017 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

Pure water has a boiling point of 100 °C and a freezing point of 0 °C. What is the boiling point and freezing point of a sample of aqueous sodium c...

2017 Summer

MCQ

CH2 - SEPARATING SUBSTANCES

A chromatogram obtained from the chromatography of four substances is shown. Which substance has an $R_f$ value of 0.6?

2017 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

Sodium reacts with chlorine to form sodium chloride.Which statements describe what happens to the sodium atoms in this reaction?1. Sodium atoms form p...

2017 Summer

MCQ

CH3 - ATOMS AND ELEMENTS

Diamond is extremely hard and does not conduct electricity.Which statement explains these properties?

2017 Summer

MCQ

CH4 - ATOMS COMBINING

Which statement about metals is not correct?

2017 Summer

MCQ

CH4 - ATOMS COMBINING

Aluminium reacts with fluorine.$xAl(s) + yF_2(g) \rightarrow zAlF_3(s)$Which values of $x$, $y$ and $z$ balance the equation?[Table_1]

2017 Summer

MCQ

CH4 - ATOMS COMBINING

Carbon monoxide burns in oxygen to produce carbon dioxide. $$2\text{CO}(g) + \text{O}_2(g) \rightarrow 2\text{CO}_2(g)$$ Which mass of carbon dioxide...

2017 Summer

MCQ

CH1 - STATES OF MATTER

Which statement about electrolysis is correct?

2017 Summer

MCQ

CH1 - STATES OF MATTER

The reactivity series for a number of different metals is shown.[Image_1: Reactivity series and diagram]The diagram shows different metal strips dippe...

2017 Summer